Characterization of pack cemented Ni(2)Al(3 )coating exposed to KCl(s) induced corrosion at 600 degrees C
Journal article, 2018

Oxidation of Ni2Al3 produced by pack aluminizing of pure nickel was studied with and without 0.10 mg cm(-2) KCl(s) deposit in an environment containing 5% O-2, 40% H2O and 55% N-2 at 600 degrees C for up to 168 h. Oxide microstructure and composition was investigated by SEM/EDX, BIB, TEM and GDOES. Oxidised Ni2Al3 shows minimal weight gain, while adding KCl results in a small weight loss consistent with evaporation of KCl. On the surface of samples exposed to the gas environment only, a 30 nm oxide of Al oxide was present, but where KCl was present as deposit, 50-250 nm thick nodules form that are enriched in K, O and Al.

KCl

Nickel aluminide

high temperature corrosion

electron microscopy

600 degrees C

Author

K. V. Dahl

Technical University of Denmark (DTU)

Andreas Slomian

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

T. N. Lomholt

Technical University of Denmark (DTU)

FORCE Technology

S. Kiamehr

Technical University of Denmark (DTU)

F. B. Grumsen

Technical University of Denmark (DTU)

M. Montgomery

Technical University of Denmark (DTU)

Torbjörn Jonsson

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Environmental Inorganic Chemistry

Materials at High Temperatures

0960-3409 (ISSN)

Vol. 35 1-3 267-274

Subject Categories

Manufacturing, Surface and Joining Technology

Materials Chemistry

Corrosion Engineering

DOI

10.1080/09603409.2017.1392112

More information

Latest update

7/6/2018 1